if_re.c build error on RELENG_6 (rev 1.46.2.5)

[Bryan Fullerton]

This was reported by someone else to -stable, but seems more
appropriate here. if_re.c breaks buildkernel on a RELENG_6 system that
was just cvsup'ed. Was not broken yesterday.

% grep FreeBSD /build/src/sys/dev/re/if_re.c
__FBSDID("$FreeBSD: src/sys/dev/re/if_re.c,v 1.46.2.5 2005/10/07
14:00:04 glebius Exp $");

% make buildkernel KERNCONF=SAMURAI
[...]
cc -c -O -pipe  -Wall -Wredundant-decls -Wnested-externs
-Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline
-Wcast-qual  -fformat-extensions -std=c99 -g -nostdinc -I-  -I.
-I/build/src/sys -I/build/src/sys/contrib/dev/acpica
-I/build/src/sys/contrib/altq -I/build/src/sys/contrib/ipfilter
-I/build/src/sys/contrib/pf -I/build/src/sys/contrib/dev/ath
-I/build/src/sys/contrib/dev/ath/freebsd
-I/build/src/sys/contrib/ngatm -I/build/src/sys/dev/twa -D_KERNEL
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common
-finline-limit=8000 --param inline-unit-growth=100 --param
large-function-growth=1000  -mno-align-long-strings
-mpreferred-stack-boundary=2  -mno-mmx -mno-3dnow -mno-sse -mno-sse2
-ffreestanding -Werror  /build/src/sys/dev/re/if_re.c
/build/src/sys/dev/re/if_re.c: In function `re_ioctl':
/build/src/sys/dev/re/if_re.c:2286: warning: 'error' might be used
uninitialized in this function
*** Error code 1

Stop in /build/obj/build/src/sys/SAMURAI.
*** Error code 1

Stop in /build/src.
*** Error code 1

Stop in /build/src.

Thanks,
Bryan